| 123456789101112131415161718 |
- #!/usr/bin/ruby
- # a(1) = 1, for n>1 a(n) = largest prime divisor of A062273(n)
- # https://oeis.org/A077576
- # First 23 terms:
- # 1, 23, 19, 263, 823, 678901, 50993, 1279, 211, 150866941, 353594393, 757819, 9012345678901, 213408443, 11904282563, 435503, 21339439879, 7403356241, 13212859242013, 27961, 205126079, 5201061865265117273, 54843374833199
- include("../../../factordb/auto.sf")
- var nums = File("b062273.txt").open_r.lines.grep{!.match(/^#/)}.map{.nums.last}.grep{defined(_)}
- var count = 0
- for n in (nums) {
- say "#{++count} #{gpf(n)||1}"
- }
|
